We have a bum-strap that clips to eyes on either side of the stove. You can brace yourself with your feet and the strap behind your bum to work on the stove or on the shelf that comes down over the stove. Works pretty well.
In South Africa doing lots of boat stuff. Departure north from Cape Town around December 15th. Arrival in the Caribbean around the beginning of February, after 5300 miles or so.